Like in any other Pokémon games, berries on Pokémon Sun and Pokemon Moon have distinct uses. Some of them can heal, others can diminish Effort Values (EVs), etc. A total of 68 berries can be found across Alola, however, as early as the game, there are only close to half unveiled yet. Here's a guide on where to find all obtainable berries revealed so far and how you can use them.
Pokémon Sun And Moon - Route 2 Berries
On Route 2, you can find berries like Chesto and Leppa. Chesto Berry can recover a Pokémon from sleep during battle. Leppa Berries can regenerate 10 PP to an exhausted move during battles.
Pokémon Sun And Moon - Route 3 Berries
On Route 3, you can search for berries like Cheri, Pecha and Sitrus. Cheri Berry can revive a Pokémon from being paralyzed during battles. Sitrus Berry can regenerate a Pokémon's HP by a pinch during battles. Pecha Berry can revive a Pokémon from being poisoned during battles.
Pokémon Sun And Moon - Route 4 Berries
On Route 4, you can find Aguav, Iapapa, Pecha berries. Both Aguav and Iapapa Berries can restore a Pokémon's HP in a pinch but it might not like their taste.
Pokémon Sun And Moon - Route 5 Berries
On Route 5, you will discover berries like Cheri, Pecha and Persim. Persim Berry can help recover a Pokémon from getting confused during battles.
Pokémon Sun And Moon - Route 8 Berries
On Route 8, berries that can be found include Cheri and Sitrus. Refer to the abovementioned uses of these berries.
Pokémon Sun And Moon - Route 10 Berries
On Route 10, you can find berries like Hondrew, Kee and Qualot. Hondrew Berry can make your Pokémon friendlier but lessens its base Special Attack. Kee Berry can increase a Pokémon's defense when attacked with a physical move. Qualot Berry can make a Pokémon friendlier too but decreases its base Defense.
Pokémon Sun And Moon - Route 16 Berries
On Route 16, you can catch berries like Aspear, Pecha and Persim. Aspear Berry can revive a Pokémon from being frozen during battles (wild encounter Crabrawler). Pecha Berry here can also be found during wild encounter with either Alolan Rattata, Raticate, Yungoos or Gumshoos. Persim Berry here can be found during encounter with Drampa.
Pokémon Sun And Moon - Route 17 Berries
On Route 17, you can find berries like Rabuta, Rawst, Sitrus and Tamato. Rabuta is a rare berry used to build Pokéblocks that improve Cleverness. Rawst Berry can recover a Pokémon from burn during battle.
Pokémon Sun And Moon - Poni Wilds Berries
On Poni Wilds, you can find quite a many berries-Chilan, Chople, Coba, Colbur, Haban, Passho, Payapa, Petaya, Salac and Yacha. Chilan Berry can diminish the damage inflicted by a Normal-type attack. Chople and Coba Berries can decrease the damage inflicted by a supereffective Fighting-type attack. Colbur Berry can lessen the damage inflicted by a supereffective Dark-type attack.
Pokémon Sun And Moon - Poni Plains Berries
On Poni Plains, you can find berries like Occa, Rindo and Shuca. Occa Berry can lower damage inflicted by a supereffective Fire-type attack. Rindo Berry can lower damage from a supereffective Grass-type attack. Shuca Berry can lessen damage inflicted by a supereffective Ground-type attack.
Pokémon Sun And Moon - Berry Field Berries
On Berry Field, you will discover Oran and Sitrus. Oran Berry can regenerate a Pokémon's HP by 10 points during battle. Sitrus Berry here can be found during wild encounter with Trumbeak.
Pokémon Sun And Moon - Secluded Shore Berries
On Secluded Shore, you can search for berries like Cheri and Leppa. Refer to the abovementioned uses of these berries.
Pokémon Sun And Moon - Royal Avenue Berries
On Royal Avenue, you can find berries like Rabuta, Rawst, Tamato, Yache. Refer to the abovementioned uses of these berries.